CN109888809A - A kind of household energy-storage battery group auto parallel Connection control method - Google Patents
A kind of household energy-storage battery group auto parallel Connection control method Download PDFInfo
- Publication number
- CN109888809A CN109888809A CN201910307005.1A CN201910307005A CN109888809A CN 109888809 A CN109888809 A CN 109888809A CN 201910307005 A CN201910307005 A CN 201910307005A CN 109888809 A CN109888809 A CN 109888809A
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- Prior art keywords
- battery modules
- host
- slave
- grid
- battery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention discloses a kind of household energy-storage battery group auto parallel Connection control method, detailed process are as follows: accesses utility grid, photovoltaic power grid through energy accumulation current converter after battery modules host startup self-detection, the battery modules host presets safe shunt voltage value range；Battery modules host does not access the battery modules slave handshake communication of DC grid with every；By the battery modules slave within the scope of safe shunt voltage and it is connected to DC grid, sending off line order to the battery modules slave being not within the scope of safe shunt voltage makes to keep armed state, standby battery modules slave repeats the process of step 2, until by all battery modules slaves and being connected to DC grid.Through the above way, the present invention provides a kind of household energy-storage battery group auto parallel Connection control method, while guaranteeing battery modules normal electricity output services, can effectively it avoid because pressure difference in parallel is compared with big battery, and electric network fault, battery failures and the human safety issues generated.
Description
Technical field
The present invention relates to battery technology field more particularly to a kind of household energy-storage battery group auto parallel Connection control methods.
Background technique
At present in household energy-storage system, inverter can mating one or more battery group need manually during installation
The matching for carrying out battery pack, battery in parallel is needed by way of discharging manually or mending electricity, the pressure difference control of all batteries
System in a certain range, then carries out the parallel connection of each battery pack.
The shortcomings that prior art:
During installation, battery pack is delivered at random, can be there is a situation where that electricity is related larger, is embodied in two battery modules
Pressure difference is larger, if pressure difference is big directly in parallel, immediate current can be very big, will cause damage, and someone to battery pack, BMS plate
Body risk for security.The prior art is discharged battery pack or is mended electricity using manual method, allows the electricity of all battery packs
Pressure difference is different in safe range, then carries out parallel connection.The method inefficiency, batch assembly can spend a large amount of artificial.
In addition, in use, if one of battery pack disconnects total output, other batteries because of abnormal conditions
Group is also in normal use, and in the case, extreme case occurs in capacity, i.e., all other battery pack is full electricity, and abnormal battery is
Empty electricity, when the output of abnormal battery recovery, all batteries can all charge to abnormal battery, and charging current can substantially exceed electricity at this time
The specification in pond and protection board, capacity causes battery, BMS dash-board injury, or even causes the major accidents such as fire.
Summary of the invention
The invention mainly solves the technical problem of providing a kind of household energy-storage battery group auto parallel Connection control methods, are protecting
While demonstrate,proving battery modules normal electricity output services, the electric network fault generated because load pressure difference is compared with big battery can be effectively avoided
And human safety issues.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: a kind of household energy-storage battery group is provided
Auto parallel Connection control method, comprising the following steps:
Step 1 accesses utility grid, photovoltaic power grid, the battery mould through energy accumulation current converter after battery modules host startup self-detection
Group host presets safe shunt voltage value range, and the battery modules host is after access utility grid, photovoltaic power grid because carrying out
Charging discharges and voltage change persistently occurs；
Step 2, battery modules host do not access the battery modules slave handshake communication of DC grid with every, obtain every electricity
Chi Mo group slave real-time voltage data；
Step 3, on the basis of the real-time voltage of battery modules host, by the battery modules within the scope of safe shunt voltage
Slave is simultaneously connected to DC grid, and sending off line order to the battery modules slave being not within the scope of safe shunt voltage makes to keep
Armed state, standby battery modules slave repeat the process of step 2, until by all battery modules from
Machine is simultaneously connected to DC grid.
In a preferred embodiment of the present invention, voltage change process described in step 1 includes two kinds of situations: photovoltaic
Power grid is DC grid charging, and battery modules host voltage increases；DC grid is utility grid power supply, battery modules host electricity
Drops.
In a preferred embodiment of the present invention, charging, discharge process are in the step 1 with for 24 hours for the period, when execution
Between are as follows:
Charging operations are executed in sunrise time to sunset period；
Discharge operation is executed in sunset time to sunrise period.
The beneficial effects of the present invention are: a kind of household energy-storage battery group auto parallel Connection control method provided by the invention,
While guaranteeing battery modules normal electricity output services, can effectively avoid because of the power grid that is generated compared with big battery of load pressure difference therefore
Barrier and human safety issues.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing, in which:
Fig. 1 is that a kind of battery pack of a preferred embodiment of household energy-storage battery group auto parallel Connection control method of the present invention is in parallel
Schematic diagram；
Fig. 2 is a kind of overall grid knot of a preferred embodiment of household energy-storage battery group auto parallel Connection control method of the present invention
Composition；
Fig. 3 is a kind of Parallel Control stream of a preferred embodiment of household energy-storage battery group auto parallel Connection control method of the present invention
Cheng Tu.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's all other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
As shown in Figure 1-3, the embodiment of the present invention includes:
A kind of household energy-storage battery group auto parallel Connection control method, comprising the following steps:
Step 1 accesses utility grid, photovoltaic power grid, the battery mould through energy accumulation current converter after battery modules host startup self-detection
Group host presets safe shunt voltage value range, and the battery modules host is after access utility grid, photovoltaic power grid because carrying out
Charging discharges and voltage change persistently occurs；
Step 2, battery modules host do not access the battery modules slave handshake communication of DC grid with every, obtain every electricity
Chi Mo group slave real-time voltage data；
Step 3, on the basis of the real-time voltage of battery modules host, by the battery modules within the scope of safe shunt voltage
Slave is simultaneously connected to DC grid, and sending off line order to the battery modules slave being not within the scope of safe shunt voltage makes to keep
Armed state, standby battery modules slave repeat the process of step 2, until by all battery modules from
Machine is simultaneously connected to DC grid.
Wherein, voltage change process described in step 1 includes two kinds of situations: photovoltaic power grid is DC grid charging, electricity
Chi Mo group host voltage increases；DC grid is utility grid power supply, the decline of battery modules host voltage.
Further, it charges in the step 1, discharge process is to execute the time for 24 hours for the period are as follows:
Charging operations are executed in sunrise time to sunset period；
Discharge operation is executed in sunset time to sunrise period.
The working principle of the invention is:
Total system is made of energy accumulation current converter (PCS) and several battery packs.Energy accumulation current converter can convert battery power
It is alternating current to grid power transmission, electricity can also be taken from power grid, charges to battery pack.
Such as Fig. 1, energy accumulation current converter can connect multiple battery packs, and each battery pack is parallel connection；
Such as Fig. 2, auto parallel Connection process is as follows:
1. host self-test opens charge and discharge electrical interface after passing through, starts to acquire slave status data and judge, if slave and master
The voltage difference of machine is in safe range and slave data are without exception, then sends simultaneously machine order to slave, otherwise sends off line life
It enables.
2. the order that slave self-test is sended over by rear receiving host, if receive and machine order if open charge and discharge electrical interface
Parallel connection access PCS.If not receiving the order of host for a long time or receiving off line instruction, slave is maintained at standby mode
On the other hand, PCS presets charging on battery modules daytime, night electric discharge.One day is a complete circulation.One is followed
Battery modules without exception can all be accessed PCS by ring.
1. starting to charge, auto parallel Connection process is executed, host mould group voltage rises, and it is initial voltage can be higher than host mould group
The slave mould group of voltage access PCS in parallel with host, charges together；
2. starting to discharge, auto parallel Connection process is executed, voltage can be lower than host mould group initial voltage by the decline of host mould group voltage
Slave mould group access PCS in parallel with host, discharge together.
If slave mould group is in abnormal conditions, disconnected from DC grid.It can lead to after slave mould group Abnormality remove
It crosses this mode and accesses PCS again automatically.
A preferred embodiment of the present invention is as follows:
Assuming that the voltage rating of household energy storage battery system is 54V, including energy accumulation current converter (PCS) and four battery modules.Four
A battery modules are respectively a host mould group and three slave mould groups, and voltage rating is 54V.The highest of battery modules charges
Voltage is 54V, and minimum discharge voltage is 30V.
PSC presets battery modules and charges in 9:00 ~ 16:00, and 19:00 ~ 22:00 discharges.Daytime is sunny,
Battery modules can charge from photovoltaic power grid；If encountering rainy weather, battery modules are not fully filled electricity, can also be from alternating current electricity
Net takes electricity.19:00 ~ the 22:00 at night is the peak of power consumption of household electric, and battery modules can power to household electrical appliance at this time.In this way
Design while alleviating Peak power use pressure, can also reduce household electricity spending.
Because of the influence of use and storage, the voltage of present four battery modules is different.
Scene one:
Assuming that the voltage of host mould group is 30V, the voltage of remaining three slave battery modules is respectively as follows: one 35V of slave, slave
Two 54V, three 30V of slave.The pressure difference safe range of slave and host is -1V ~ 1V.
Daytime, battery modules started to charge.Host voltage increases, and the pressure difference of slave three and host is 0V, in safe range
Interior, slave three is in parallel with host, charges together；When output voltage rises to 34V, slave one and the pressure difference of host are 1V, are being pacified
In gamut, slave one is in parallel with host, charges together；When output voltage rises to 53V, slave two and the pressure difference of host are
1V, it is in safe range, in parallel with host, it charges together.So far, three slave battery modules all connect with host modules in parallel
Enter PCS.Stop charging when total battery modules voltage reaches 54V.
Night battery modules start to discharge, and the voltage of host mould group and slave mould group is all 54V at this time.After host is opened,
Pressure difference with slave is all 0, in safe range, in parallel with host, together supplying power for outside.Total battery modules voltage reaches 30V,
Stop electric discharge.
Scene two:
Assuming that the voltage of host mould group is 48V, the voltage of remaining three slave battery modules is respectively as follows: one 48V of slave, slave
Two 54V, three 30V of slave.The pressure difference safe range of slave and host is -1V ~ 1V.
Daytime, battery modules started to charge.Host voltage increases, and the pressure difference of slave one and host is 0V, in safe range
Interior, slave one is in parallel with host, charges together；When output voltage rises to 53V, slave two and the pressure difference of host are 1V, are being pacified
It is in parallel with host in gamut, it charges together.So far, also surplus host three does not access PCS with host modules in parallel.In total battery
Mould group voltage stops charging when reaching 54V.
Night battery modules start to discharge, and the voltage of host mould group and slave one, slave two is all 54V at this time.Host is opened
Qi Hou, the pressure difference with slave one, slave two are all 0, and in safe range, slave one, slave two are in parallel with host, together externally
Power supply.When host voltage drops to 31V, the pressure difference of slave three and host is 1V, in safe range, in parallel with host, together
Electric discharge.So far, three slave battery modules all access PCS with host modules in parallel.Total mould group cell voltage reaches 30V, stops
Only discharge.
Judge that the voltage latter one of slave is incorporated to slave by host, that is, ensure that supplying power for outside, and balance each mould
The voltage of group, it is often more important that battery modules will not be damaged and threaten the personal safety of user.
In conclusion guaranteeing battery mould the present invention provides a kind of household energy-storage battery group auto parallel Connection control method
While group normal electricity output services, the electric network fault generated because load pressure difference is compared with big battery and person peace can be effectively avoided
Full problem.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright description is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (3)
1. a kind of household energy-storage battery group auto parallel Connection control method, which comprises the following steps:
Step 1 accesses utility grid, photovoltaic power grid, the battery mould through energy accumulation current converter after battery modules host startup self-detection
Group host presets safe shunt voltage value range, and the battery modules host is after access utility grid, photovoltaic power grid because carrying out
Charging discharges and voltage change persistently occurs；
Step 2, battery modules host do not access the battery modules slave handshake communication of DC grid with every, obtain every electricity
Chi Mo group slave real-time voltage data；
Step 3, on the basis of the real-time voltage of battery modules host, by the battery modules within the scope of safe shunt voltage
Slave is simultaneously connected to DC grid, and sending off line order to the battery modules slave being not within the scope of safe shunt voltage makes to keep
Armed state, standby battery modules slave repeat the process of step 2, until by all battery modules from
Machine is simultaneously connected to DC grid.
2. the household energy-storage battery group auto parallel Connection control method according to claim 1, which is characterized in that in step 1
The voltage change process includes two kinds of situations: photovoltaic power grid is DC grid charging, and battery modules host voltage increases；Directly
Galvanic electricity net is utility grid power supply, the decline of battery modules host voltage.
3. the household energy-storage battery group auto parallel Connection control method according to claim 1, which is characterized in that the step
Charging, discharge process are in one to execute the time for 24 hours for the period are as follows:
Charging operations are executed in sunrise time to sunset period；
Discharge operation is executed in sunset time to sunrise period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910307005.1A CN109888809A (en) | 2019-04-17 | 2019-04-17 | A kind of household energy-storage battery group auto parallel Connection control method |
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|---|---|---|---|
| CN201910307005.1A CN109888809A (en) | 2019-04-17 | 2019-04-17 | A kind of household energy-storage battery group auto parallel Connection control method |
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| CN109888809A true CN109888809A (en) | 2019-06-14 |
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| CN201910307005.1A Pending CN109888809A (en) | 2019-04-17 | 2019-04-17 | A kind of household energy-storage battery group auto parallel Connection control method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601230A (en) * | 2019-09-19 | 2019-12-20 | 国电南瑞科技股份有限公司 | Quick response control method and system for energy storage system of alternating current-direct current power distribution network |
| CN111509805A (en) * | 2020-04-28 | 2020-08-07 | 浙江衡睿科技有限公司 | Low-voltage parallel battery operation control system and method |
| CN116565357A (en) * | 2023-07-12 | 2023-08-08 | 苏州精控能源科技有限公司 | Self-adaptive management method, device, medium and equipment of household storage power supply system |
| CN117458561A (en) * | 2023-10-24 | 2024-01-26 | 三峡大学 | Control method and system for household energy storage parallel battery pack |
| WO2024040584A1 (en) * | 2022-08-26 | 2024-02-29 | 宁德时代未来能源(上海)研究院有限公司 | Connection control method and apparatus, computer device, and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110601230A (en) * | 2019-09-19 | 2019-12-20 | 国电南瑞科技股份有限公司 | Quick response control method and system for energy storage system of alternating current-direct current power distribution network |
| CN110601230B (en) * | 2019-09-19 | 2022-10-14 | 国电南瑞科技股份有限公司 | Quick response control method and system for energy storage system of alternating current-direct current power distribution network |
| CN111509805A (en) * | 2020-04-28 | 2020-08-07 | 浙江衡睿科技有限公司 | Low-voltage parallel battery operation control system and method |
| WO2024040584A1 (en) * | 2022-08-26 | 2024-02-29 | 宁德时代未来能源(上海)研究院有限公司 | Connection control method and apparatus, computer device, and storage medium |
| CN116565357A (en) * | 2023-07-12 | 2023-08-08 | 苏州精控能源科技有限公司 | Self-adaptive management method, device, medium and equipment of household storage power supply system |
| CN116565357B (en) * | 2023-07-12 | 2023-09-05 | 苏州精控能源科技有限公司 | Self-adaptive management method, device, medium and equipment of household storage power supply system |
| CN117458561A (en) * | 2023-10-24 | 2024-01-26 | 三峡大学 | Control method and system for household energy storage parallel battery pack |
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| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Zhuohua Inventor after: Li Yao Inventor after: Qian Jinghui Inventor after: Wu Qiang Inventor before: Wang Zhuohua Inventor before: Qian Jinghui Inventor before: Wu Qiang |
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Application publication date: 20190614 |